 The link between Xingyi Quan and Bagua was most likely forged when Cheng Tinghua and his friends Li Cunyi, Zhang Zhaodong, Liu Dekuan, and Liu Wai-Hsiang got together to compare styles and learn from each other (Li Cunyi, Liu Te-Kuan, and Zhang Zhaodong were all Hsing-I boxing brothers under the same teacher, Liu Chi-Lan.Liu Wai-Hsiang was a Xingyi Quan student of Zhang Zhaodong).Cheng Tinghua was a very open martial artist who would teach his Bagua to anyone who cared to learn it.